Author: davidsamuelps

IPv4 to IPv6: from 32 to 128 bits

Here we are again, people! This time, i decided to write a post about IPv6, being this protocol part of our present and future (even past, because it is being used since years ago). As most of you must have IPv4 (because IPv6 adoption is going SO slow), maybe IPv6 could be an alien protocol

Continue reading

ACLs: Filtering Insights

Heeello everyone! Again, sorry for the late post, I am trying to do them more often (sometimes it’s quite challenging). GRE Saga is on hold, i am looking for actors and proper scenes to make the history interesting. So, castings are taking place! If you have suggestions about a new topic or whatever you think can

Continue reading

GRE Tunnels III: Security awakens

Heeey! 😀 Here we are again (sorry for the delay in this post, been quite busy lately), this time we will talk about security (a little bit) on GRE tunnels. As we talked previously (see previous chapters of the GRE Saga), we can establish a tunnel between two peers, over the public internet, right? (chapter

Continue reading

GRE Tunnels II: Endless connections

As every movie saga, like Terminator, Star Wars, The Naked gun, Shrek or Resident Evil (loved that one), GRE tunnels are going to have an interesting and cinematographic role here at our blog. Maybe not re-killing zombies (yes, killing them again!) or saving a princes making the dragon eat a dwarf king (that escalated quicky), but

Continue reading

GRE Tunnels

All cadets salute the GRE tunnels! 😀 Today we will talk a little about GRE tunnels, a very useful protocol that can help you a lot. As you may now, its present in CCNP R&S blueprint and CCNA v2/v3 as well blueprint (check here for more information about V2 to v3 changes). But, what are

Continue reading

CCNA Refresh!

As you maybe are aware of, Cisco announced on May 17th an interesting change in its Cisco Certified Entry Networking Technician (CCENT) and Cisco Certified Network Associate (CCNA) Routing and Switching certifications. As always happens with this announcements, there are changes on the exam numbers and their blueprint. I will let you know in a quick

Continue reading